Exploration of influencing factors of sulfate wastewater treatment by SRB
Using upflow fixed bed anaerobic biofilm(UFAB)reactor to treat artificial simulated wastewater,the factors influencing sulfate reducing bacteria(SRB)treating sulfate wastewater were studied,the effect of car-bon-sulfur ratio,carbon source types,HRT,sulfate concentration and some other factors on sulfate removal were investigated.The results showed that,under the condition that the value of n(TOC)/n(SO42-)was 6,the mixed carbon source was formic acid-acetic acid-sodium lactate(mass ratio of 1∶1∶4),the mass concentration of sul-fate in influent water was 1 200 mg/L,the HRT was 9 h,the average removal rate of sulfate reached 83.80％,which showed good desulfuration ability,the average mass concentration of sulfate in effluent water was 194.4 mg/L.The effluent water met the quality requirements as surface water source of centralized drinking water in GB 3838-2002 Environmental quality standards for surface water.
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